diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index d0df1fd..13d5fe4 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -10890,6 +10890,9 @@
 		result = strbuf;
 		break;
 #endif
+	default:
+		result = (char_u *)""; /* avoid gcc warning */
+		break;
 	}
 
 	resultlen = (int)STRLEN(result);	/* length of new string */